LEV Testing · Welwyn Garden City
Welwyn Garden City's pharmaceutical, laboratory and engineering employers run LEV over processes that raise fume, mist and dust the law says must be controlled. We examine and test it to HSG258 and certify it.
Welwyn Garden City has long been a centre for pharmaceutical and research employers, and its business parks add engineering and light manufacturing. The laboratory fume cupboards, the process extraction and the workshop LEV across the town all have to capture what they raise - solvent vapour, fume, mist or dust - at source.
LEV falls out of tune unseen - filters load, ducts fur, fans tire - until a hood or cupboard no longer controls the exposure. We carry out thorough examination and testing to HSG258 across Welwyn Garden City: measured capture and face velocities at the working points, a verdict against the system's intended performance, and a label whose next-due date holds.
CNC and manual machining raises oil mist and metal dust at the enclosure and bench that has to be captured at source.
Flour, powders and steam need capture at the mixing and process points, from bakeries to production kitchens.
Saws, sanders and routers throw fine wood dust that has to be drawn off at the tool and the bench.
Weld fume and grinding dust need capture at the arm and booth, wherever steel is fabricated.
Bodyshop spray booths and prep bays carry paint mist and solvent vapour that the extraction has to hold and clear.
Fume cupboards, safety cabinets and dental and salon extraction all count as LEV and all fall due on the same clock.
Real jobs, described by sector and area - never by a client's name.
At a laboratory in the town, the fume cupboards needed their thorough examination. We measured face velocity across each sash opening, checked the containment and airflow, set out what to correct, and re-tested to confirm control before certifying.
A business-park engineering unit's weld-fume arms needed testing. We measured capture at each arm and the transport velocity through the ducting, flagged a slow arm, and re-tested after the fix before certifying.
Condition of hoods, ducting, filters and fan - the damage, blockage and wear that quietly drops performance.
Measured capture and face velocities at the working points, plus transport velocity and static pressure through the system.
The readings assessed against how the LEV should perform to actually control the exposure - not just whether the fan turns.
Where the process warrants it, sampling to confirm the control is keeping the substance out of the breathing zone.
The point of a thorough examination and test is to prove the extraction still controls the exposure - so we measure it, we do not eyeball it. Condition, capture and face velocities, transport velocity and static pressure are checked against the design intent under HSG258, and the result is written up and labelled on the plant.
We test to the HSE's guidance, HSG258, and the job ends in a report and a label on the plant: what was measured, what passed, what needs putting right, and the date the next test falls due.
We examine the condition of the hoods, ducting, filter and fan and how each is meant to control its process.
We measure capture and face velocities, transport velocity and static pressure at every key point.
The readings are judged against the design benchmark under HSG258, with a clear pass or fail on control.
The plant is labelled and you get the report and next-due date for your COSHH records.
At least every 14 months for most systems, more often for higher-risk work. We set the interval to the process and label it on the plant.
For fume cupboards, face velocity and containment; for extraction, capture and face velocities, transport velocity and static pressure - all against how the system should perform to control the exposure.
We set out exactly what failed - often one reading - so it can be put right, and re-test to confirm control before certifying.
Yes - fume cupboards, welding fume, dust and mist extraction and spray booths all fall under the same duty and the same clock.
Yes - the laboratories, process plant and engineering units across Welwyn Garden City, and the wider Hertfordshire.
The town's laboratories and process plant depend on fume cupboards and extraction that has to keep solvent vapour and process emissions out of the breathing zone. We test to HSG258 so those sites can prove their containment and extraction control what their people are exposed to.
We have carried out LEV thorough examination and testing to HSG258 since 2001, across Hertfordshire and the UK. From a machine shop to a joinery, a spray booth or a lab fume cupboard, the job ends the same way: measured readings, a clear verdict, and a label whose next-due date you can rely on.
Tell us what you run and we will examine, measure, report and label it to HSG258 - across Hertfordshire.
